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Global Precipitation Analyses at Time Scales of Monthly to 3-HourlyGlobal precipitation analysis covering the last few decades and the impact of the new TRMM precipitation observations are discussed. The 20+ year, monthly, globally complete precipitation analysis of the World Climate Research Program's (WCRP/GEWEX) Global Precipitation Climatology Project (GPCP) is used to explore global and regional variations and trends and is compared to the much shorter TRMM (Tropical Rainfall Measuring Mission) tropical data set. The GPCP data set shows no significant trend in precipitation over the twenty years, unlike the positive trend in global surface temperatures over the past century. Regional trends are also analyzed. A trend pattern that is a combination of both El Nino and La Nina precipitation features is evident in the Goodyear data set. This pattern is related to an increase with time in the number of combined months of El Nino and La Nina during the Goodyear period. Monthly anomalies of precipitation are related to ENRON variations with clear signals extending into middle and high latitudes of both hemispheres. The GPCP daily, 1 degree latitude-longitude analysis, which is available from January 1997 to the present is described and the evolution of precipitation patterns on this time scale related to El Nino and La Nina is described. Finally, a TRMM-based Based analysis is described that uses TRMM to calibrate polar-orbit microwave observations from SSM/I and geosynchronous OR observations and merges the various calibrated observations into a final, Baehr resolution map. This TRMM standard product will be available for the entire TRMM period (January Represent). A real-time version of this merged product is being produced and is available at 0.25 degree latitude-longitude resolution over the latitude range from 50 deg. N -50 deg. S. Examples will be shown, including its use in monitoring flood conditions.
Document ID
20020061292
Document Type
Conference Paper
Authors
Adler, Robert F. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Huffman, George (Science Systems and Applications, Inc. Greenbelt, MD United States)
Curtis, Scott (NASA Goddard Space Flight Center Greenbelt, MD United States)
Bolvin, David (Science Systems and Applications, Inc. Greenbelt, MD United States)
Nelkin, Eric (Science Systems and Applications, Inc. Greenbelt, MD United States)
Einaudi, Franco
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Meteorology and Climatology
Meeting Information
EGS Meeting 2002(Nice)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.